To give you some more background. What I was asking are what are the rating thresholds to be considered a Poor rating, a fair rating, good and excellent.
i.e Is a 2.0HH rtg in broadcast considered Poor? Good? etc.
What would be the thresholds for the various mediums? Broadcast nets and tiered cable.
Labels like "poor" and "good" are very subjective when applied to objective data like ratings.
In cable especially, where target selectivity can be most important, this can be a meaningless exercise. Is US total rating or coverage rating the comparison?
Objectively, "Tiers" is not even a standard term. Is your tier system based on numbers of subscriber homes or sales volume or another factor?
The Weather Channel, which has the most subscribers, usually has a rating around 0.2 among its 100 million subscribers. DIY, with less than 60% as many subscribers and a rating more like 0.15 might well be considered far more valuable to an advertiser of paints, tools, flooring, etc.
If you insist on ranking and tiering, take all the networks and rank them by subscriber counts, then divide them into 4 groups from high to low. Then rank the nets in each group by coverage are rating and divide each set into poor/fair/good, etc.
This might answer your question, but the Guru does not see it as particularly useful without including factors specific to a particular media plan.